AI Tools

Generate a valid OpenAI function-calling tool definition in seconds. Add the function name and description, define parameters (name, type, required, description, enum) visually, and get a tools JSON with a proper parameters JSON Schema ready to copy.

Build well-structured prompts with system, user and assistant roles in your browser. Add or remove role messages, choose ready-made presets for writing, coding, translation and support, fill in {{variable}} placeholders, then copy the prompt or export a JSON messages array.

Estimate the cost of embedding calls from document count, average length and model price. Includes built-in prices for popular models and knowledge-base scale projections.

Estimate your LLM API costs from input/output tokens and per-model pricing. Pick from built-in prices for GPT, Claude and Gemini, or enter your own rates, then see the cost per call, per day and per month — great for budgeting and batch estimates.

Convert chat message formats between OpenAI, Claude and Gemini while preserving roles and content. Paste a JSON, let the source format be detected automatically, and get the target format ready to copy — handy for API migration and debugging.

Export AI conversations as clean Markdown or styled HTML. Supports role labels and keeps code blocks intact — perfect for archiving or sharing.

Turn a Markdown document into a clean, well-structured prompt. Heading levels, lists and code blocks are preserved, and you can prepend or append instructions before copying.

Free online AI token counter: paste any text to instantly estimate the input token count for GPT, Claude, Gemini and other LLMs. Handles mixed Chinese/English content and shows characters, words, estimated tokens and per-model cost — ideal for prompt debugging and cost estimation.

A curated library of system prompt templates for writing, coding, translation, customer support and more. Copy in one click or edit before use.

Extractive text summarizer that runs entirely in your browser. It scores sentences by word frequency and position to pull out the key points and produce a Chinese or English summary — great for skimming long texts.

Extract high-frequency and topic keywords from any text using word frequency and TF-IDF, all locally in your browser. Works with Chinese and English — handy for SEO and content analysis.

Build Stable Diffusion and Midjourney prompts visually: pick tags for subject, style, lens, lighting, quality and negative prompts, add your own tags, set weights like (word:1.2), and copy the finished positive and negative prompts in real time.